Switchable display panel, method for fabricating the same, and switchable display device

ABSTRACT

A display panel, a method for fabricating the same and a display device are disclosed. The display panel includes a top emission AMOLED display sub-panel, a normally-white mode reflective display sub-panel provided on the top emission AMOLED display sub-panel, and a switching element configured to turn on the top emission AMOLED display sub-panel and turn off the normally-white mode reflective display sub-panel according to a received first instruction, and turn on the normally-white mode reflective display sub-panel and turn off the top emission AMOLED display sub-panel according to a received second instruction.

CROSS REFERENCE TO RELATED APPLICATIONS

This patent application is a divisional application of U.S. patentapplication Ser. No. 15/547,372 filed on Jul. 28, 2017, which is aNational Stage Entry of PCT/CN2016/077330 filed on Mar. 25, 2016, whichclaims priority of Chinese Patent Application No. 201510314277.6, filedon Jun. 9, 2015, the disclosures of which are incorporated herein intheir entirety as part of the present application.

BACKGROUND

Exemplary embodiments of the present disclosure relate to a displaypanel, a method for fabricating the same, and a display device.

In recent years, with the popularity of smart phones, tablet PCs andother mobile terminals, display screens with smaller sizes have beenwidely used, mainly concentrated in active matrix organic light emittingdiode (AMOLED) display, low-temperature poly-silicon (LTPS) LCD display,high-resolution amorphous silicon (a-Si) LCD display, and the like.People's living habits also have changed greatly with the popularity ofmobile terminals like smart phones, and the use thereof for a long timeresults in eye fatigue and physical discomfort, especially improperreading in outdoor conditions. Although there are display products likeeye-protected reflective electronic paper in the market, such displayproduct like electronic paper cannot achieve color display, resulting inpoor video/web view effect, greatly limiting the market thereof.

In view of the above habitual conflict, some manufacturers have proposeddual-mode display products enabling both color display and black/whitedisplay. For example, a YotaPhone 2 smart phone has a 5-inch SuperAMOLED full HD screen on one side and a 4.7-inch reflective electronicpaper screen with a resolution ratio of 960×540 on the other side. Suchstructure needs to turn over the display when the two screens are beingviewed, which is complex in operation, easily damaging the other sidewhen viewing one side.

BRIEF DESCRIPTION

The present disclosure aims to provide a display panel, a method forfabricating the same, and a display device, so as to achieve bothreflective display and color display on the same side of the displaydevice.

According to a first aspect of the present disclosure, there is provideda display panel including, a top emission AMOLED display sub-panel, anormally-white mode reflective display sub-panel provided on the topemission AMOLED display sub-panel, and a switching element configured toturn on the top emission AMOLED display sub-panel and turn off thenormally-white mode reflective display sub-panel according to a receivedfirst instruction, and turn on the normally-white mode reflectivedisplay sub-panel and turn off the top emission AMOLED display sub-panelaccording to a received second instruction.

According to an embodiment of the present disclosure, the top emissionAMOLED display sub-panel includes a first reflective electrode.

According to an embodiment of the present disclosure, the top emissionAMOLED display sub-panel further includes, a first substrate on whichthe first reflective electrode is provided, an organic light emittinglayer being provided on the first reflective electrode, a secondelectrode provided on the organic light emitting layer, and a packagelayer provided on the second electrode.

According to an embodiment of the present disclosure, a thickness of theorganic light emitting layer is smaller than a predetermined thickness.

According to an embodiment of the present disclosure, the normally-whitemode reflective display sub-panel includes a polarizing plate.

According to an embodiment of the present disclosure, the normally-whitemode reflective display sub-panel further includes a second substrateprovided on the package layer, a thin film transistor provided on thesecond substrate, a liquid crystal layer provided on the thin filmtransistor, wherein the polarizing plate is provided on the liquidcrystal layer.

According to an embodiment of the present disclosure, a phase delay ofthe second substrate is smaller than a preset value.

According to an embodiment of the present disclosure, the display panelfurther an adhesive layer provided between the second substrate and thepackage layer.

According to an embodiment of the present disclosure, the display panelfurther a touch sub-panel provided below the top emission AMOLED displaysub-panel or provided above the normally-white mode reflective displaysub-panel, wherein, if the touch sub-panel is provided below the topemission AMOLED display sub-panel, the normally-white mode reflectivedisplay sub-panel further includes a third substrate provided on thepolarizing plate, and a protective layer provided on the thirdsubstrate.

According to an embodiment of the present disclosure, the normally-whitemode reflective display sub-panel further includes, a flat layerprovided between the second substrate and the thin film transistor.

According to an embodiment of the present disclosure, the normally-whitemode reflective display sub-panel further includes a barrier layerprovided below the second substrate.

According to an embodiment of the present disclosure, a sum of thethicknesses of the flat layer, the second substrate, the barrier layer,the package layer, the second electrode and the organic light emittinglayer is between 35 and 60 micrometers (μm).

According to an embodiment of the present disclosure, the normally-whitemode reflective display sub-panel further includes a color film layerprovided between the liquid crystal layer and the polarizing plate.

According to a second aspect of the present disclosure, there is furtherprovided a display device including a display panel according to any oneof the above.

According to a third aspect of the present disclosure, there is furtherprovided a method for fabricating a display panel. The method includesforming a top emission AMOLED display sub-panel, and forming anormally-white mode reflective display sub-panel on the top emissionAMOLED display sub-panel, wherein the top emission AMOLED displaysub-panel is turned on by a switching element when receiving a firstinstruction and is turned off by the switching element when receiving asecond instruction, and the normally-white mode reflective displaysub-panel is turned off by the switching element when receiving thefirst instruction, and is turned on by the switching element whenreceiving the second instruction.

According to an embodiment of the present disclosure, forming the topemission AMOLED display sub-panel includes forming a first reflectiveelectrode.

According to an embodiment of the present disclosure, forming the topemission AMOLED display sub-panel further includes forming a firstsubstrate before forming the first reflective electrode, wherein thefirst reflective electrode is provided on the first substrate, formingan organic light emitting layer on the first reflective electrode,forming a second electrode on the organic light emitting layer, andforming a package layer on the second electrode.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel on the top emissionAMOLED display sub-panel includes forming a polarizing plate.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel on the top emissionAMOLED display sub-panel further includes forming a second substrate onthe package layer, forming a thin film transistor on the secondsubstrate, and forming a liquid crystal layer on the thin filmtransistor, wherein the polarizing plate is formed after the liquidcrystal layer is formed.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel on the top emissionAMOLED display sub-panel further includes forming an orientation layeron both sides of the liquid crystal layer by mechanical friction orlight irradiation.

According to an embodiment of the present disclosure, forming the thinfilm transistor includes forming the thin film transistor in thetemperature below 200° C.

According to an embodiment of the present disclosure, the method forfabricating the display panel further includes forming an adhesive layeron the package layer before forming the second substrate.

According to an embodiment of the present disclosure, the method forfabricating the display panel further includes forming a touch sub-panelbefore forming the top emission AMOLED display sub-panel or forming atouch sub-panel after forming the normally-white mode reflective displaysub-panel, wherein if the touch sub-panel is formed before the topemission AMOLED display sub-panel is formed, forming the normally-whitemode reflective display sub-panel further includes forming a thirdsubstrate on the polarizing plate, and forming a protective layer on thethird substrate.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel before forming the thinfilm transistor further includes forming a flat layer on the secondsubstrate.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel further includesforming a barrier layer on the package layer before forming the secondsubstrate.

According to an embodiment of the present disclosure, a sum of thethicknesses of the flat layer, the second substrate, the barrier layer,the package layer, the second electrode and the organic light emittinglayer is between 35 and 60 micrometers (μm).

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel further includesforming a color film layer between the liquid crystal layer and thepolarizing plate.

According to the above-described technical solution, by fabricating thenormally-white mode reflective display sub-panel on the top emissionAMOLED display sub-panel, it is possible to switch, on one operationinterface, to the reflective sub-panel to achieve a good display effectunder strong light, or to the top emission AMOLED display sub-panel toachieve viewing color content. The display panel, the method forfabricating the same and the corresponding display device according tothe embodiments of the present disclosure are easy to operate and simplein structure.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in theembodiments of the present disclosure or the prior art, the drawings,which are to be used in the description of the embodiments or the priorart, will be briefly described below. It will be apparent that thedrawings in the following description are merely some embodiments of thepresent disclosure, and other drawings may be obtained by those ofordinary skill in the art based on these drawings without creative work.

FIG. 1 shows a schematic structural view of a display panel according toan embodiment of the present disclosure;

FIG. 2 shows a top view of a display panel according to an embodiment ofthe present disclosure;

FIG. 3 shows a partial enlarged view of a dotted line portion in FIG. 2;

FIG. 4 shows a schematic view of a specific structure of a display panelaccording to an embodiment of the present disclosure;

FIG. 5 shows a schematic view of the specific structure of a displaypanel according to another embodiment of the present disclosure;

FIG. 6 shows a schematic view of the specific structures of a flat layerand a barrier layer according to an embodiment of the presentdisclosure;

FIG. 7 shows a schematic view of the specific structure of a displaypanel according to yet another embodiment of the present disclosure;

FIG. 8 shows a schematic flow chart of a method for fabricating adisplay panel according to an embodiment of the present disclosure;

FIG. 9 shows a schematic flow chart of forming a top emission AMOLEDdisplay sub-panel according to an embodiment of the present disclosure;and

FIG. 10 shows a schematic flow chart of forming a normally-white modereflective display sub-panel according to an embodiment of the presentdisclosure.

DETAILED DESCRIPTION

The technical solutions in the embodiments of the present disclosurewill now be described clearly and completely below in conjunction withthe accompanying drawings in the embodiments of the present disclosure,and it will be apparent that the described embodiments are merely partof the embodiments of the present disclosure instead of all of theembodiments. All other embodiments obtained by those of ordinary skillin the art based on the embodiments in the present disclosure withoutcreative work are within the scope of the present disclosure.

As shown in FIG. 1, a display panel according to an embodiment of thepresent disclosure includes a top emission AMOLED display sub-panel 1, anormally-white mode reflective display sub-panel 2 provided on the topemission AMOLED display sub-panel 1, and a switching element configuredto turn on the top emission AMOLED display sub-panel 1 and turn off thenormally-white mode reflective display sub-panel 2 according to areceived first instruction, and turn on the normally-white modereflective display sub-panel 2 and turn off the top emission AMOLEDdisplay sub-panel 1 according to a received second instruction.

According to the embodiment of the present disclosure, by fabricatingthe normally-white mode reflective display sub-panel 2 on the topemission AMOLED display sub-panel 1, it is possible to switch the twodisplay sub-panels on one operation interface, so the operation is easyand the structure is simple. Moreover, the use of the normally-whitemode reflective display sub-panel 2 needs no backlight source, therebyreducing the display energy consumption. Since light with high-energyand strong-penetrability is substantially not reflected, and a largeamount of light with high-energy strong-penetrability is filtered outafter light is reflected, the reflected light has very few damages oneyes, with an eye protection effect.

For example, in the environment where the outdoor light is strong, thenormally-white mode reflective display sub-panel 2 may be turned on todisplay the content, and the top emission AMOLED display sub-panel 1 maybe turned off. While in the environment where the indoor light is weak,the top emission AMOLED display sub-panel 1 may be turned on to displaythe color content and the normally-white mode reflective displaysub-panel 2 may be turned off. The display panel according to theembodiment of the present disclosure facilitates the user's selection ofthe display sub-panel as desired, thereby making the viewing mode moreflexible and the operation of switching the display sub-panels moreconvenient.

As shown in FIGS. 2 and 3, the normally-white mode reflective displaysub-panel 2 is provided on the top emission AMOLED display sub-panel 1,and the area of the normally-white mode reflective display sub-panel 2can be set slightly smaller than that of the top emission AMOLED displaysub-panel 1 so as to enhance the stability of the whole structure.

According to the embodiment of the present disclosure, the resolution ofthe top emission AMOLED display sub-panel 1 is 300 ppi (the number ofpixels per unit area), the resolution of the normally-white modereflective display sub-panel 2 is between 50 ppi and 150 ppi, and theblack matrix in the normally-white mode reflective display sub-panel 2is wider, for example, the width of the black matrix is between 20 μmand 50 μm (micrometers).

As shown in FIG. 4, according to the embodiment of the presentdisclosure, the top emission AMOLED display sub-panel 1 includes a firstreflective electrode 12 configured for driving an organic light emittinglayer 13 in the top emission AMOLED display sub-panel 1, and providingreflected light for the normally-white mode reflective display sub-panel2.

With the first reflective electrode 12 of the top emission AMOLEDdisplay sub-panel 1, for example, an anode, to drive the organic lightemitting layer 13 in the top emission AMOLED display sub-panel 1 andprovide reflected light to the normally-white reflective displaysub-panel 2, the provision of a reflective layer in the normally-whitemode reflective display sub-panel 2 may be omitted, thereby reducing thelayer structures in the display panel, and reducing the thickness of thedisplay panel.

According to an embodiment of the present disclosure, the top emissionAMOLED display sub-panel 1 further includes a first substrate 11 onwhich the first reflective electrode 12 is provided, an organic lightemitting layer 13 being provided on the first reflective electrode 12, asecond electrode 14 provided on the organic light emitting layer 13, anda package layer 15 provided on the second electrode 14.

According to an embodiment of the present disclosure, a thickness of theorganic light emitting layer 13 is smaller than a preset thickness, forexample, 3 μm or 1.2 μm (micrometers). According to an embodiment of thepresent disclosure, the thickness of the organic light emitting layer 13is between 0.2 μm and 3 μm (micrometers). According to anotherembodiment of the present disclosure, the thickness of the organic lightemitting layer 13 is between 0.8 μm and 1.2 μm (micrometers).

Since the organic light emitting layer 13 is generally weak in lighttransmission, setting the thickness of the organic light emitting layer13 to be small may ensure that the organic light emitting layer 13 has ahigh light transmittance, so that the light incident from thenormally-white mode reflective display sub-panel 2 may smoothly reachthe first reflective electrode 12 and then is reflected by the firstreflective electrode 12, so as to achieve a reflective display of thenormally-white mode reflective display sub-panel 2.

As shown in FIG. 4, according to an embodiment of the presentdisclosure, the normally-white mode reflective display sub-panel 2includes a polarizing plate 24 configured for blocking or transmittingthe light exiting from the top emission AMOLED display sub-panel 1, orfor blocking or transmitting the light exiting from the normally-whitemode reflective display sub-panel 2.

With the polarizing plate 24 (e.g., a circular polarizing plate) in thenormally-white mode reflective display sub-panel 2 which can block ortransmit the light exiting from the top emission AMOLED displaysub-panel 1 or block or transmit the light exiting from thenormally-white mode reflective display sub-panel 2, there is no need toprovide a polarizing plate in the top emission AMOLED display sub-panel1, thereby reducing the layer structures in the display panel andreducing the thickness of the display panel.

According to an embodiment of the present disclosure, the normally-whitemode reflective display sub-panel 2 further includes a second substrate21 provided on the package layer 15 and having a thickness of 5 to 30 μm(micrometers), a thin film transistor (not shown) provided on the secondsubstrate 21, the thin film transistor including a gate, a source, adrain, an active layer, and the like, wherein the gate is provided onthe second substrate 21, the gate is provided with a gate insulatinglayer thereon, the source, the drain and the active layer are providedon the gate insulating layer, and the drain is also connected to a pixelelectrode, a liquid crystal layer 22 provided on the thin filmtransistor, wherein a common electrode may further be provided on theliquid crystal layer 22, an orientation layer may be provided on bothsides of the liquid crystal layer, and a material of the orientationlayer may be polyimide, wherein the polarizing plate 24 is provided onthe liquid crystal layer 22, and in a case that the common electrode isprovided on the liquid crystal layer 22, the polarizing plate 24 isprovided on the common electrode, and the liquid crystal is deflectedwhen a voltage is applied between the pixel electrode and the commonelectrode.

According to an embodiment of the present disclosure, the thin filmtransistor may be a low-temperature-fabricated a-Si TFT, an organic TFT,a low-temperature oxide TFT, or a solution-type semiconductor TFT.

According to an embodiment of the present disclosure, the secondsubstrate 21 may employ a transparent plastic substrate having arelatively high temperature tolerance and a low phase delay. The phasedelay of the second substrate 21 is smaller than a preset value, forexample, 3000 nm or 2500 nm (nanometers). According to an embodiment ofthe present disclosure, the phase delay of the second substrate 21 isbetween 1000 nm and 3000 nm (nanometers). According to anotherembodiment of the present disclosure, the phase delay of the secondsubstrate 21 is between 1500 nm to 2500 nm (nanometers). Setting thephase delay of the second substrate 21 to be small may reduce theinfluence on the light passing through the second substrate 21, forexample, the second substrate 21 may employ a fiber-reinforce polymer(i.e., FRP).

As shown in FIG. 5, the display panel according to an embodiment of thepresent disclosure further includes an adhesive layer 3 provided betweenthe second substrate 21 and the package layer 15, and configured forbonding the second substrate 21 and the package layer 15 to increase thedegree of firm bonding between the top emission AMOLED display sub-panel1 and the normally-white mode reflective display sub-panel 2.

A display panel according to an embodiment of the present disclosurefurther includes a touch sub-panel (not shown in FIG. 5) provided belowthe top emission AMOLED display sub-panel 1 or above the normally-whitemode reflective display sub-panel 2.

If the touch sub-panel is provided below the top emission AMOLED displaysub-panel 1, the normally-white mode reflective display sub-panel 2further includes a third substrate 25 provided on the polarizing plate24, and a protective layer (not shown in FIG. 5) provided on the thirdsubstrate 25.

In a case where the touch sub-panel is provided above the normally-whitemode reflective display sub-panel 2, the touch sub-panel may be locatedon the outermost side (e.g., the uppermost side) of the display panel,and may serve as an upper substrate and a protective layer of thenormally-white mode reflective display sub-panel 2. In a case where thetouch sub-panel is provided below the top emission AMOLED displaysub-panel 1, the normally-white mode reflective display sub-panel 2 islocated on the outermost side (for example, the uppermost side) of thedisplay panel, and it is necessary to provide an upper substrate for thenormally-white mode reflective display sub-panel 2 (i.e. the thirdsubstrate 25) to sandwich the liquid crystal layer 22, and to provide acorresponding protective layer to avoid damages to the internalstructure.

As shown in FIG. 6, according to an embodiment of the presentdisclosure, the normally-white mode reflective display sub-panel 2further includes a flat layer 26 provided between the second substrate21 and the thin film transistor. The flat layer 26 may provide a flatenvironment for the fabricating of thin film transistors in thenormally-white mode reflective display sub-panel 2.

According to an embodiment of the present disclosure, the normally-whitemode reflective display sub-panel 2 further includes a barrier layer 27provided below the second substrate 21. The barrier layer 27 may blockmoisture and oxygen and increase the packaging effect of the topemission AMOLED display sub-panel 1.

According to the embodiment of the present disclosure, a sum of thethicknesses of the flat layer 26, the second substrate 21, the barrierlayer 27, the package layer 15, the second electrode 14, and the organiclight emitting layer 13 is between 35 and 60 μm (micrometers).

The first reflective electrode 12 serves as the reflective layer of thenormally-white mode reflective display sub-panel 2, and in a case thatthe distance from the liquid crystal layer 22 is large, the lightreflected by the first reflective electrode 12 has a large deflectionangle, which easily results in light leakage. Setting the sum of thethicknesses of the flat layer 26, the second substrate 21, the barrierlayer 27, the package layer 15, the second electrode 14, and the organiclight emitting layer 13 to be between 35 and 60 μm (micrometers), mayensure that the light reflected by the first reflective electrode 12 hasa small deflection angle after passing through these layers, therebyreducing light leakage.

As shown in FIG. 7, according to an embodiment of the presentdisclosure, the normally-white mode reflective display sub-panel 2further includes a color film layer 23 provided between the liquidcrystal layer 22 and the polarizing plate 24.

If the normally-white mode reflective display sub-panel 2 is required toachieve a color display, a color film layer 23 may be provided on theliquid crystal layer 22, but it is necessary to set the sum of thethicknesses of the flat layer 26, the second substrate 21, the barrierlayer 27, the package layer 15, the second electrode 14, and the organiclight emitting layer 13 to be between 35 and 60 μm (micrometers) toensure that the light reflected by the first reflective electrode 12 hasa small deflection angle after passing through these layers, therebyreducing color mixing when the reflected light exits out of the colorfilm layer 23.

The present disclosure further proposes a display device including adisplay panel according to any of the foregoing.

It should be noted that the display device in the present embodiment maybe any product or component having a display function such as anelectronic paper, a mobile phone, a tablet computer, a television set, anotebook computer, a digital photo frame, a navigator, or the like.

As shown in FIG. 8, the present disclosure also provides a method forfabricating a display panel, which includes S1, forming a top emissionAMOLED display sub-panel 1, S2, forming a normally-white mode reflectivedisplay sub-panel 2 on the top emission AMOLED display sub-panel 1,wherein the top emission AMOLED display sub-panel 1 is turned on by aswitching element when receiving a first instruction and is turned offby the switching element when receiving a second instruction, and thenormally-white mode reflective display sub-panel 2 is turned off by theswitching element when receiving the first instruction, and is turned onby the switching element when receiving the second instruction.

As shown in FIG. 9, according to an embodiment of the presentdisclosure, forming the top emission AMOLED display sub-panel 1 includesS12, forming a first reflective electrode 12 configured for driving theorganic light emitting layer 13 in the top emission AMOLED displaysub-panel 1 and providing reflected light for the normally-white modereflective display sub-panel 2.

According to an embodiment of the present disclosure, forming the topemission AMOLED display sub-panel 1 further includes S11, forming afirst substrate 11 before forming the first reflective electrode 12,wherein the first reflective electrode 12 is provided on the firstsubstrate 11, S13, forming an organic light emitting layer 13 on thefirst reflective electrode 12, S14, forming a second electrode 14 on theorganic light emitting layer 13, and S15, forming a package layer 15 onthe second electrode 14.

As shown in FIG. 10, according to an embodiment of the presentdisclosure, forming the normally-white mode reflective display sub-panel2 on the top emission AMOLED display sub-panel 1 includes S24, forming apolarizing plate 24 configured for blocking or transmitting the lightexiting from the top emission AMOLED display sub-panel 1, or blocking ortransmitting the light exiting from the normally-white mode reflectivedisplay sub-panel 2.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel 2 on the top emissionAMOLED display sub-panel 1 further includes S21, forming a secondsubstrate 21 on the package layer 15, S22, forming a thin filmtransistor on the second substrate 21, and S23, forming a liquid crystallayer 22 on the thin film transistor. For example, several drops ofliquid crystals are added on the thin film transistor and are thenvacuum-aligned with the sub-panel on the liquid crystal layer to form aliquid crystal layer 22, wherein a sealant may be selected and coated onthe periphery of the sub-panel on the liquid crystal layer, wherein, thepolarizing plate 24 is formed after the liquid crystal layer 22 isformed.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel 2 on the top emissionAMOLED display sub-panel 1 further includes forming an orientation layeron both sides of the liquid crystal layer 22 by mechanical friction orlight irradiation. Since the process of forming the orientation layer bymechanical friction and light irradiation cannot be performed in ahigh-temperature environment, damages to the second substrate 21 can beavoided. Of course, in a case where the second substrate 21 canwithstand a high temperature, the orientation layer may also be formedby selecting a plasma radiation or the like as necessary.

According to an embodiment of the present disclosure, forming the thinfilm transistor includes forming the thin film transistor in thetemperature below 200° C.

Since the phase delay of the second substrate 21 needs to be set low toreduce its influence on the transmitted light and the substrate materialhaving a low phase delay is low in temperature resistance and canwithstand a temperature of about 200° C., when a thin film transistor(TFT) is formed on the second substrate 21, it is necessary to controlthe process temperature below 200° C. to avoid damages to the secondsubstrate 21. Moreover, when the orientation layer of the liquid crystallayer 22 is fabricated, a low-temperature curing material having acuring temperature, for example of less than or equal to 200° C., may beselected to avoid damages to the second substrate 21 during curing.

According to an embodiment of the present disclosure, the thin filmtransistor produced at a low temperature may be a-Si TFT, an organicTFT, a low temperature oxide TFT, or a solution-type semiconductor TFT.

The method for fabricating the display panel according to an embodimentof the present disclosure further includes forming an adhesive layer 3on the package layer 15 before forming the second substrate 21. Theadhesive layer 3 may be configured for bonding the second substrate 21and the package layer 15.

The method for fabricating the display panel according to the embodimentof the present disclosure further includes forming a touch sub-panelbefore forming the top emission AMOLED display sub-panel 1 or forming atouch sub-panel after forming the normally-white mode reflective displaysub-panel 2, wherein if the touch sub-panel is formed before the topemission AMOLED display sub-panel 1 is formed, forming thenormally-white mode reflective display sub-panel 2 further includes S25,forming a third substrate 25 on the polarizing plate 24, and S26,forming a protective layer on the third substrate 25.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel 2 further includesforming a flat layer 26 on the second substrate 21 before forming thethin film transistor.

According to an embodiment of the present disclosure, forming thenormally-white mode reflective display sub-panel 2 further includesforming a barrier layer 27 on the package layer 15 before forming thesecond substrate 21.

According to an embodiment of the present disclosure, the formingprocess employed in the above-described processes may include, forexample, patterning processes such as deposition, sputtering, andetching.

The technical solution of the present disclosure has been described indetail with reference to the accompanying drawings. In the prior art, itis necessary to turn over the display when viewing the reflective screenand the AMOLED screen, resulting in complex operations, and easilydamaging the other side when viewing one side. According to thetechnical solution of the present application, by fabricating thenormally-white mode reflective display sub-panel on the top emissionAMOLED display sub-panel, it is possible to switch the reflectivesub-panel on one operation interface to achieve a good display effectunder strong light, or switch the top emission AMOLED display sub-panelto achieve viewing color content. The display panel and the fabricatingmethod thereof and the corresponding display device according to theembodiment of the present disclosure are easy to operate and simple instructure.

It is to be noted that in the drawings, the dimensions of the layers andregions may be exaggerated for clarity of illustration. Moreover, itwill be appreciated that when an element or layer is referred to asbeing “on/above” another element or layer, it may be directly on/abovethe other element, or there may be an intermediate layer. In addition,it will be appreciated that when an element or layer is referred to asbeing “under/below” another element or layer, it may be directlyunder/below the other element, or there may be more than oneintermediate layer or element. In addition, it will also be appreciatedthat when a layer or element is referred to as being “between” twolayers or two elements, it may be a unique layer between the two layersor two elements, or there may be more than one intermediate layer orcomponent. Similar reference numerals refer to similar elementsthroughout.

In the present disclosure, the terms “first”, “second”, and “third” arefor descriptive purposes only and are not to be construed as indicatingor implying relative importance. The term “plural” means two or more,unless otherwise expressly stated.

The foregoing is merely about the specific embodiments of the presentdisclosure, but the scope of the present disclosure is not limitedthereto, and any person skilled in the art can easily think ofvariations or substitutions within the technical scope of the presentdisclosure, which shall be encompassed within the scope of the presentdisclosure. Accordingly, the scope of protection of the presentdisclosure should be based on the scope of protection of the claims.

What is claimed is:
 1. A method for fabricating a display panel, themethod comprising: forming a top emission AMOLED display sub-panel,wherein forming a top emission AMOLED display sub-panel comprises:forming a first substrate; forming a first reflective electrode on thefirst substrate; forming an organic light emitting layer on the firstreflective electrode; forming a second electrode on the organic lightemitting layer; and forming a package layer on the second electrode; andforming a normally-white mode reflective display sub-panel on the topemission AMOLED display sub-panel, wherein forming the normally-whitemode reflective display sub-panel on the top emission AMOLED displaysub-panel comprises: forming a second substrate on the package layer;forming a flat layer on the second substrate; forming a thin filmtransistor on the flat layer; forming a liquid crystal layer on the thinfilm transistor; and forming a polarizing plate on the liquid crystallayer; and wherein the top emission AMOLED display sub-panel is turnedon by a switching element when receiving a first instruction and isturned off by the switching element when receiving a second instruction,and the normally-white mode reflective display sub-panel is turned offby the switching element when receiving the first instruction, and isturned on by the switching element when receiving the secondinstruction.
 2. The method according to claim 1, wherein forming thenormally-white mode reflective display sub-panel on the top emissionAMOLED display sub-panel further comprises: forming an orientation layeron both sides of the liquid crystal layer by mechanical friction orlight irradiation.
 3. The method according to claim 1, furthercomprising: forming a touch sub-panel before forming the top emissionAMOLED display sub-panel or forming a touch sub-panel after forming thenormally-white mode reflective display sub-panel, wherein if the touchsub-panel is formed before the top emission AMOLED display sub-panel isformed, forming the normally-white mode reflective display sub-panelfurther comprises: forming a third substrate on the polarizing plate;and forming a protective layer on the third substrate.
 4. The methodaccording to claim 1, wherein forming the normally-white mode reflectivedisplay sub-panel further comprises: forming a color film layer betweenthe liquid crystal layer and the polarizing plate.
 5. A switchabledisplay panel comprising: a top emission AMOLED display sub-panel; anormally-white mode reflective display sub-panel provided on the topemission AMOLED display sub-panel; and a switching element configured toturn on the top emission AMOLED display sub-panel and turn off thenormally-white mode reflective display sub-panel according to a receivedfirst instruction, and turn on the normally-white mode reflectivedisplay sub-panel and turn off the top emission AMOLED display sub-panelaccording to a received second instruction, and wherein the top emissionAMOLED display sub-panel comprises a first reflective electrodeconfigured to drive an organic light emitting layer in the top emissionAMOLED display sub-panel and to provide reflected light to thenormally-white reflective display sub-panel.
 6. The switchable displaypanel according to claim 5, wherein the top emission AMOLED displaysub-panel further comprises: a first substrate on which the firstreflective electrode is provided, an organic light emitting layer beingprovided on the first reflective electrode; a second electrode providedon the organic light emitting layer; and a package layer provided on thesecond electrode.
 7. The switchable display panel according to claim 6,wherein a thickness of the organic light emitting layer is smaller thana predetermined thickness.
 8. The switchable display panel according toclaim 5, wherein the normally-white mode reflective display sub-panelcomprises: a polarizing plate; a second substrate provided on thepackage layer; a thin film transistor provided on the second substrate;and a liquid crystal layer provided on the thin film transistor, whereinthe polarizing plate is provided on the liquid crystal layer.
 9. Theswitchable display panel according to claim 8, wherein a phase delay ofthe second substrate is smaller than a preset value.
 10. The switchabledisplay panel according to claim 9, further comprising: an adhesivelayer provided between the second substrate and the package layer. 11.The switchable display panel according to claim 10, further comprising:a touch sub-panel provided below the top emission AMOLED displaysub-panel or provided above the normally-white mode reflective displaysub-panel, wherein, if the touch sub-panel is provided below the topemission AMOLED display sub-panel, the normally-white mode reflectivedisplay sub-panel further comprises: a third substrate provided on thepolarizing plate; and a protective layer provided on the thirdsubstrate.
 12. A switchable display device comprising the switchabledisplay panel according to claim
 5. 13. The switchable display deviceaccording to claim 12, wherein the top emission AMOLED display sub-panelfurther comprises: a first substrate on which the first reflectiveelectrode is provided, an organic light emitting layer being provided onthe first reflective electrode; a second electrode provided on theorganic light emitting layer; and a package layer provided on the secondelectrode.
 14. The switchable display device according to claim 13,wherein a thickness of the organic light emitting layer is smaller thana predetermined thickness.
 15. The switchable display device accordingto claim 12, wherein the normally-white mode reflective displaysub-panel comprises: a polarizing plate; a second substrate provided onthe package layer; a thin film transistor provided on the secondsubstrate; and a liquid crystal layer provided on the thin filmtransistor, wherein the polarizing plate is provided on the liquidcrystal layer.
 16. The switchable display device according to claim 15,wherein a phase delay of the second substrate is smaller than a presetvalue.
 17. The switchable display device according to claim 16, furthercomprising: an adhesive layer provided between the second substrate andthe package layer.
 18. The switchable display device according to claim17, further comprising: a touch sub-panel provided below the topemission AMOLED display sub-panel or provided above the normally-whitemode reflective display sub-panel, wherein, if the touch sub-panel isprovided below the top emission AMOLED display sub-panel, thenormally-white mode reflective display sub-panel further comprises: athird substrate provided on the polarizing plate; and a protective layerprovided on the third substrate.